Home / 21,129.44-29,158.48-11,698.08

Finding the Fourth Proportional to 21,129.44, 29,158.48 and 11,698.08

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Solution

The fourth proportional to 21,129.44, 29,158.48 and 11,698.08 is: 16,143.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.44 : 29,158.48 = 11,698.08 : x
  2. Step 2: Convert to fraction form
    21,129.44/29,158.48 = 11,698.08/x
  3. Step 3: Cross multiply
    21,129.44x = 29,158.48 × 11,698.08
  4. Step 4: Simplify right side
    21,129.44x = 341,098,231.72
  5. Step 5: Solve for x
    x = 341,098,231.72/21,129.44
  6. Step 6: Final answer
    x = 16,143.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.